With hstore you can add schema-less data to PostgreSQL. This allows you to store model attributes without creating separate database columns. Watch how to do this using the activerecord-postgres-hstore gem.
(10 minutes)

Postgres offers full-text searching right out of the box. This episode shows how to write queries from scratch, apply tools like Texticle and pg_search, and optimize performance through indexes.
(16 minutes)

This episode continues on the Twitter Bootstrap project showing how to display flash messages, add form validations with SimpleForm, customize layout with variables, and switch to using Sass.
(12 minutes)

MiniTest is a fast and lightweight testing library. Here you will learn how to use it in a Rails app for model, helper, and integration testing. The Turn gem is also demonstrated for prettier test output.
(15 minutes)

In the second part of this two part series on Backbone.js, we finish up the Raffler application. Included is how to create entries through a form, respond to events, extract sub-views, pre-populate records, visit routes, and more.
(24 minutes)